Hi Folks , I have a couple questions here and Hope I find the answer.....
I am doing a Project that uses about +70v (Unregulated) for the Power amp section and about +35 (Unregulated) for the Preamp section and the Transformer I have is a 28v 0v 28V AC Center tapped Transformer...
So here is my question , Is there a way I can use Both 28v windings for the Power amp section and still use Only one of the windings for the Preamp section???
I am thinking If I rectify both the 28v windings and get about
+/-35v DC (under Load) and take the +/- 35v DC and Paralell them and I get about 70V, and then Take one of the 28v AC winding before the +/- rectifier and rectify it seperately to get +35v DC for the Preamp section......
Would this work??
Thanx a Lot......
Cheers
I am doing a Project that uses about +70v (Unregulated) for the Power amp section and about +35 (Unregulated) for the Preamp section and the Transformer I have is a 28v 0v 28V AC Center tapped Transformer...
So here is my question , Is there a way I can use Both 28v windings for the Power amp section and still use Only one of the windings for the Preamp section???
I am thinking If I rectify both the 28v windings and get about
+/-35v DC (under Load) and take the +/- 35v DC and Paralell them and I get about 70V, and then Take one of the 28v AC winding before the +/- rectifier and rectify it seperately to get +35v DC for the Preamp section......
Would this work??
Thanx a Lot......
Cheers
Hi, maybe the problem is you don"t understand my question??? Is my english bad??? Is my questions Stupid?? am I an idiot for even asking???
If you just need 0V, +/- 35V, and +35V, you can probably do it. Or, if you need +70V and +35V and 0V, you can probably do it.
Voltage is "relative". You just have to pick some point to name as the relative DC "ground" or "0V" point.
So if you have two 35V DC sources, you can put them in series (not parallel) to get 70V between their "outer ends". The lower voltage side of one of the 35V sources would then be called ground, or 0 V. The lower voltage side of the other 35V source would be connected to the higher side of the first one. That would give you 0V, 35V, and 70V points (or 0V, -35V, and -70V, if you name the other end "ground").
If the lower voltage sides of both 35V sources are connected together, you can call it +/-35V, and call the center connection "0V" or "ground".
It may be possible to connect them, or connect TO them, in other ways. But you might then have two different "ground" voltages, 35V (or 70V) apart from each other.
You could always download LTspice, from linear.com, and try it out very easily as a simple simulation. You can just use AC voltage sources for the transformer windings, and use discrete (separate) diodes and capacitors for the rest.
- Tom Gootee
http://ww.fullnet.com/~tomg/index.html
-
Voltage is "relative". You just have to pick some point to name as the relative DC "ground" or "0V" point.
So if you have two 35V DC sources, you can put them in series (not parallel) to get 70V between their "outer ends". The lower voltage side of one of the 35V sources would then be called ground, or 0 V. The lower voltage side of the other 35V source would be connected to the higher side of the first one. That would give you 0V, 35V, and 70V points (or 0V, -35V, and -70V, if you name the other end "ground").
If the lower voltage sides of both 35V sources are connected together, you can call it +/-35V, and call the center connection "0V" or "ground".
It may be possible to connect them, or connect TO them, in other ways. But you might then have two different "ground" voltages, 35V (or 70V) apart from each other.
You could always download LTspice, from linear.com, and try it out very easily as a simple simulation. You can just use AC voltage sources for the transformer windings, and use discrete (separate) diodes and capacitors for the rest.
- Tom Gootee
http://ww.fullnet.com/~tomg/index.html
-
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